(19)

(11)

EP 2 102 542 A2

(12)

(88) Date of publication A3: 30.10.2008 (43) Date of publication: 23.09.2009 Bulletin 2009/39 (21) Application number: 07872468.9 (22) Date of filing: 27.11.2007

(51) International Patent Classification (IPC):  F16L 58/10(2006.01) (86) International application number: PCT/IB2007/004484 (87) International publication number: WO 2008/090411 (31.07.2008 Gazette 2008/31)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 01.12.2006 US 872615 P 27.04.2007 US 914699 P 29.05.2007 US 940690 P 28.08.2007 US 846489 (71) Applicant: Tenaris Connections AG 9494 Schaan (LI)	(72) Inventors: CARCAGNO, GABRIEL, EDUARDO FL9494 Schaan (LI) ENDRES, KLAUS 66482 Zweibrucken (DE) (74) Representative: Gervasi, Gemma  Notarbartolo & Gervasi GmbH Bavariaring 21 80336 München 80336 München (DE)